The authors compute 3-colorings of Canada (576) and 4-colorings of France (5,184), but their two independent computations for the 48-state USA map give inconsistent totals (12,811,729,152 vs 12,811,591,729,152).
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How many ways to color the map of America?
The authors compute 3-colorings of Canada (576) and 4-colorings of France (5,184), but their two independent computations for the 48-state USA map give inconsistent totals (12,811,729,152 vs 12,811,591,729,152).